Not to detract from the Gavin abuse, but I'm having a rough go of it with one of my cats.
Back story, I had two cats for the longest time, and one (Rocky) passed away on April 1st at about age 14. I guess it was sort of a blessing that he just passed in his sleep one day, in his favorite sunny spot on my bed. The second one (Amira, about 11) never really cared for Rocky, and was probably more thrilled that he wasn't around than anything else. They never fought or anything like that, she just ignored him as much as possible, which sort of sucked because that was the whole reason I got her, as a companion for Rocky. But she is the best lap cat ever. I can't sit down for 5 minutes without her being in my lap.
About 3 weeks after Rocky passed, I got another cat from the pound (still not decided on a name, yes I suck). He was from a home that had a dog and an older cat that apparently terrorized him, so they had kept him locked in a room for the majority of his 1 year, according to the people at the SPCA anyway. They eventually realized that wasn't a life for the cat so they gave him up. He spent the better part of the first two weeks at my place hiding, but eventually he got more confident and even pretty much claimed the new cat tree I bought as his own, and he basically lives there now. He's young and energetic and probably a pain in the ass to Amira now, but overall they seemed to be getting along well enough (essentially her ignoring him like she did with Rocky).
The problem lies in that about 2 weeks ago I noticed Amira was looking pretty thin and her coat was getting unkempt and dull. She had been sneezing and seemed to have a bit of a respiratory issue a little prior to that, so I figured she was just not feeling well. Took her to the vet and they loaded her with antibiotics and fluids, but long story short, multiple vet visits, ultrasounds, x-rays, etc. they can't find anything wrong with her besides a little general inflammation (other than the obvious weight loss and elevated liver readings that are a result of cats not eating). She's just not eating. I tried all kinds of foods, hard and soft, she's even stopped eating tuna which used to be her absolute favorite. She won't even lick up parmesan cheese which used to be like crack for Rocky and her. I'm feeding her critical care high nutrition stuff through a syringe by forcing it into her mouth and she licks and swallows it by reflex, but she fucking hates that obviously. They tried anti-nausea stuff, appetite enhancers, etc. Right now she's on steroids just to help make sure the inflammation is gone and to maybe help kickstart her appetite.
For those that don't know, cats will actually starve themselves to death if they get too far along in the process. According to the vet, their bodies process fat more efficiently than humans, so they start burning it sooner but it fucks up their liver and can lead to fatty liver disease. If that gets too advanced it causes all kinds of systemic problems, including fucking up their brains and obviously death.
She pretty much just hides under or on my bed all day long, so this weekend I went ahead and closed the door to my bedroom/bathroom area to separate her in case it was the new cat that was stressing her out for some reason. It doesn't seem to bother her that she's in there because she rarely left anyway. And this way I can monitor exactly what she eats (nothing that isn't forced into her) and drinks (not enough). But at least she is still drinking and pissing, no poop yet, she's that malnourished it seems. Maybe it will take awhile longer for her to settle down and stop worrying about the other cat, if that was even what caused her to stop eating in the first place. I sort of doubt it was, since she'd just push past him to the food when she wanted it, but I'm trying everything I can think of.
The only option left if she won't start eating on her own is to get a feeding tube inserted somehow (the vet mentioned it but didn't go into detail), but obviously I don't want to go to that extreme if I can help it, because that has to suck for anyone, animal or human. I'm literally at my wits end, and I don't know what to do. She's basically withering away in front of me, and I'm just keeping her alive by forcing food into her. She's attentive and wants loving if I give it to her, but she doesn't really come looking for it anymore, because she has no energy.
I know the vet is giving me the best advice they can, and there probably isn't much anyone here can say to fix it, but I sort of needed to just put it all down somewhere because I come home from work every day expecting to find her dead, and it is tearing me up. I can't lose both of them in a few months. Sorry for the downer post.